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Server 2000 domain controller issues after adding a 2003 server

Long ago I installed a windows 2000 Domain controller , several years later I installed a windows 2003 server as a domain controller, I now want to shut off the windows 2000 domian controller, while attemting this i am finding that the clients are not authenticating to the 2003 domain controller.

can anyone help me with this, is there something i might have missed?

Also i did open AD users and computers on the 2003 server after i shut down the 2000 server and it was empty.

is this possibly only a replication issue?
Microsoft Server OSWindows Server 2003Microsoft Legacy OS

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Darius Ghassem
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Darius Ghassem
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Did you do the required steps to add the Windows 2003 Server as a domain controller? You need to move the FSMO roles over to the 2003 server. You need to make sure that the 2003 DNS points to itself.

Disregard the last link this is the correct one.

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Darius Ghassem
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I believe i did do the add prep and forest prep steps, but it was a long time ago.

is there a way to check, and would it hurt to run it again?
I haven't ever not run the adprep and forestprep to see if it even allows you to add a 2003 server without doing it. I don't think it will because of Schema changes that need to happen before the 2003 server is installed. Try the other suggestions first like is the 2003 server a global catalog and the FSMO roles. Also, if the DNS IP address is setup correctly in the TCP\IP settings.
Windows Server 2003
Windows Server 2003

Windows Server 2003 was based on Windows XP and was released in four editions: Web, Standard, Enterprise and Datacenter. It also had derivative versions for clusters, storage and Microsoft’s Small Business Server. Important upgrades included integrating Internet Information Services (IIS), improvements to Active Directory (AD) and Group Policy (GP), and the migration to Automated System Recovery (ASR).

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